Sulphur-burning apparatus



May 28, 1929.

O. BUSE SULPHUR BURNING APPARATUS Filed Nov. 2, 1925 SK/S/R/KL (like:wag,

Patented May 28, 1929.

UNITED STATES PATENT OFFICE.

OTTO BUSE, OF CLEVELAND, OHIO ASSIGNOR, BY MESNE ASSIGNMENTS; TO THEGRASSELLI CHEMICAL COMPANY, 0] CL wAnE.

EVELAND, OHIO, A CORPORATION OE DELA- SULPHUR-BURNIN G APPARATUS.

The present invention relates to a process and apparatus for theproduction of gas of ahigh and uniform sulphur dioxid content from thesulphurous gases of low or variable or both low and variable sulphurdioxid content obtained in commercial operations such a as the roastingof sulphid ores.

In various manufacturing operations utilizing sulphur dioxid, forinstance, in the production of sulphuric acid, sulphite pulp, and thelike, a uniform and high sulphur dioxid content. The use of a gas havingthese characteristics is of great advantage, since the use of a dilutegas makes the handling of a large amount of unproductive material and acorresponding while fluctuations in the sulphur dioxid strength of thegas result in irregular operating conditions and make it difiicult toutilize the gas to the best advanta e.

The invention provides for the production of a gas of a uniform and highsulphur dioxid content in a simple and eflicient manner by introducingmelted elemental sulphur into the gases of low or variable or both lowand variable sulphur dioxid content where it burns, forming sulphurdioxid "which suppl ements the sulphur dioxid content of the gases, thequantity of melted elemental sulphur so introduced being controlled withreferenceto the sulphur dioxid content of the gases under treatment andthe sulphur dioxid content deshed in the product.

A feature of my invention resides in means whereby sulphur is firstmelted by the heat from the treated gas and is then brought intointimate contact therewith.

It will be evident that my invention may be applied with advantage tosulphur dioxidcontaining gases derived from various sources, but for'thepurpose of illustration it is important to use a gas having increase incapacity of apparatus necessary,

drop in the sulphur dioxid before the time for the next raking operationwhen it reaches its lowest value.

In the following detailed description of the invention reference will bemade to the accompanying drawings in which, I Fig. 1 is a longitudinalsection of a sulphurous gas flue with the sulphur feeding anddistributing devices of my invention shown in side elevation ;-and

Fig. 2 is a transverse section of the sulphurous gas flue with thesulphur feeding and distributing devices in front elevation. Referringto the drawings, H is a. flue adapted to carry sulphurous gases from aMathiesen-Hegeler kiln or similar sulphurous gas-producing device (notillustrated), A is a hopper which may be conical or of other suitableshape adapted to contain elemental sulphur, B is a pipe extending fromthe lower end of the hopper A through the upper wall of the fiue H, E isa cone valve carried by the shaft G and controlled-by the hand wheel F,adapted to close the lower end of the feed pipe B, and C is aninclined'plate having transverse corrugations adapted to receive themelted sulphur delivered by the pipe B and to spread it over arelatively large surface in the path of the sulphurous gases. Inoperation elemental sulphur is supplied to the hopper A from which itfalls down into the pipe B and is melted by the heat of the sulphurousgases passing through the flue -H and flows through the cone valve Eonto the corrugated plate C. The action of the sloping corrugated plateis to spread the melted sulphur so that it presents a relatively largesurface to the sulphurous gases. The sulphur on the plate 0 burns in thesulphurous gases, forming S0 which is added to' the sulphur dioxidcontent thereof. If it is merely desired to enrich the sulphurous gasesthe supply of sulphur to the plate C 'may be constant, but for producinga gas of uniform sulphur dioxid content the supply of sulphur is variedwith variations in the sulphur dioxid content of the gases. Forinstance, just after the ore in a Mathiesen- 'Hegeler kiln has beenstirred the supply of sulphur may be stopped or cut to the mini mum, andthen as the sul hur dioxid content of the gases gradually alls thesupply of present until just sulphur-is correspondingly increased sothat I claim the sulphur dioxid content of the resultant Sulphur burningapparatus comprising agas is maintained fairly constant. gas conduit, aninclined corrugated plate in 1 As is apparent, the movement of the valvesaid conduit, and means for delivering melted 5 E may be controlled byautomatic apparatus sulphur onto said plate.

sensi ve to changes in the sulphur dioxid Intestimony whereof,I aflix mysignature. content of the sulphurous gases. OTTO BUSE.

